So I have been having an issue with my truck towing trailers in the sense that I will randomly lose my running lights or brakes not working and getting the messages Service Trailer Brake System or Check Trailer Connection. I took it to the dealership they said it must be the trailer, however when I connect any trailer to my truck I have the same issue. When I connect those trailers to any other vehicle I have no issues at all which leads me to believe it’s my truck not the trailer. Dealership said to bring it to them when it has the code, yea so you want me to drive loops around your dealership with a trailer until I get the message? Then what? I have read some people say it’s the brake fluid and some say it’s the trailer brake relay (like a $30 fix). Anyways I was just looking to see if anyone else had these exact issues. Thank you!! Sent from my iPhone using Tapatalk Pro